Severe Thunderstorm Warning 59, NWS Morristown, TN

Area Forecast Discussion
National Weather Service Morristown TN
614 PM EDT Thu May 31 2018

.DISCUSSION...Quick update to the forecast to raise POPs quite a
bit than what was previously forecast. Areas along and north of
I-40 raised to categorical and just south of I-40 raised to
likely. This is all to account for the showers and storms
currently seen on radar. Also raised QPF quite a bit for these
areas as well, generally around half an inch for most places. Some
areas will see more and some less. Storms not overly strong at
this hour. However, still a threat for isolated wind damage and
flooding as some of these storms have moderate to heavy rainfall.

&&

.PRELIMINARY POINT TEMPS/POPS...
Chattanooga Airport, TN             71  86  70  87 /  50  60  60  20
Knoxville McGhee Tyson Airport, TN  70  84  69  87 /  80  60  60  40
Oak Ridge, TN                       70  84  69  87 /  80  60  40  30
Tri Cities Airport, TN              66  81  65  81 /  80  60  60  50

&&

.MRX WATCHES/WARNINGS/ADVISORIES...
NC...None.
TN...None.
VA...None.
&&

SR

Hazardous Weather Outlook
National Weather Service Morristown TN
322 PM EDT Thu May 31 2018

NCZ060-061-TNZ012>018-035>047-067>074-081>087-098>102-VAZ001-002-
005-006-008-011930-
Cherokee-Clay-Scott TN-Campbell-Claiborne-Hancock-Hawkins-
Sullivan-Johnson-Morgan-Anderson-Union-Grainger-Hamblen-
Northwest Cocke-Cocke Smoky Mountains-Northwest Greene-
Southeast Greene-Washington TN-Unicoi-Northwest Carter-
Southeast Carter-Roane-Loudon-Knox-Jefferson-NW Blount-
Blount Smoky Mountains-North Sevier-Sevier Smoky Mountains-
Sequatchie-Bledsoe-Rhea-Meigs-McMinn-Northwest Monroe-
Southeast Monroe-Marion-Hamilton-Bradley-West Polk-East Polk-Lee-
Wise-Scott-Russell-Washington-
322 PM EDT Thu May 31 2018 /222 PM CDT Thu May 31 2018/

This Hazardous Weather Outlook is for portions of Southwest North
Carolina...East Tennessee and Southwest Virginia.

.DAY ONE...This Afternoon and Tonight

Strong to marginally severe storms will be possible this afternoon
across the Southern Appalachians. The main impacts with these
storms will be damaging winds and hail up to quarter size. Heavy
downpours on an already saturated ground will lead to areas of
localized flash flooding, especially in areas of poor drainage.

Another round of showers and storms will move in late tonight into
early Friday morning. The threats with these storms will once
again be damaging winds and hail up to quarter size. Best chances
for severe weather this evening will be north of I-40 and west of
I-75. Heavy rainfall will once again lead to the possibility of
localized flash flooding, especially in areas of poor drainage.

A flood warning remains in effect for areas in southwest North
Carolina along the Hiawasse River and associated tributaries
related to the higher than normal dam release from Lake Chatuge.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Showers and thunderstorms will move across the forecast area
Friday afternoon into Friday night. Some strong to severe storms
could occur, especially north of the Knoxville area, Friday
evening. Damaging winds would be the main concern, with some hail
possibly occurring as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation maybe needed this afternoon and evening.

Special Weather Statement
National Weather Service Morristown TN
616 PM EDT THU MAY 31 2018

TNZ016>018-042>047-VAZ008-312315-
Sullivan TN-Washington TN-Northwest Greene TN-Northwest Carter TN-
Southeast Carter TN-Southeast Greene TN-Unicoi TN-Hawkins TN-
Johnson TN-Washington VA-
616 PM EDT THU MAY 31 2018

...SIGNIFICANT WEATHER ADVISORY FOR SULLIVAN...SOUTHERN HAWKINS...
WASHINGTON...GREENE...UNICOI...JOHNSON...CARTER AND SOUTHEASTERN
WASHINGTON COUNTIES UNTIL 715 PM EDT...

At 616 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Rogersville to near Whitetop.
Movement was southeast at 25 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Johnson City, Kingsport, Bristol Tn, Greeneville, Elizabethton,
Erwin, Mountain City, Jonesborough, Tusculum, Banner Hill, Central,
Midway, Pine Crest, Colonial Heights, Gray, Oak Grove, Hampton,
Spurgeon, Walnut Hill and Unicoi.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3659 8168 3653 8171 3647 8170 3640 8174
      3634 8171 3634 8177 3636 8179 3634 8184
      3630 8191 3620 8198 3615 8219 3616 8222
      3613 8225 3614 8229 3604 8261 3607 8264
      3601 8275 3632 8314 3671 8166 3664 8161
TIME...MOT...LOC 2216Z 308DEG 23KT 3632 8301 3667 8165

DGS

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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
720 PM EDT THU MAY 31 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0705 PM     TSTM WND DMG     MAYNARDVILLE            36.25N 83.81W
05/31/2018                   UNION              TN   911 CALL CENTER

            TREES AND POWER LINES DOWN COUNTY-WIDE IN UNION COUNTY.

&&

DH

Special Weather Statement
National Weather Service Morristown TN
721 PM EDT THU MAY 31 2018

TNZ069>071-073-010000-
Jefferson TN-Knox TN-NW Blount TN-North Sevier TN-
721 PM EDT THU MAY 31 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN KNOX...SOUTH CENTRAL
JEFFERSON AND CENTRAL SEVIER COUNTIES UNTIL 800 PM EDT...

At 721 PM EDT, Doppler radar was tracking a strong thunderstorm near
Knoxville, moving east at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Knoxville, Sevierville, Gatlinburg, Pigeon Forge, McMahan, Lake
Forest, Harrisburg, Fairgarden, Seymour, Kodak and Kimberlin Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3580 8382 3590 8398 3607 8390 3595 8335
      3576 8344 3572 8354
TIME...MOT...LOC 2321Z 291DEG 24KT 3597 8386

SR